RDS_DB_NAME

RDS_DB_USERNAME

RDS_DB_PASSWORD

RDS_DB_HOST

AWS_ACCESS_KEY_ID

AWS_SECRET_ACCESS_KEY

S3_BUCKET_NAME

HEROKU_APP_NAME

RDS_DB_SGID

Gain insights into Django web development. Learn about setting up URLs, views, templates, user accounts, search filters, styling with Bootstrap, and cloud deployment using AWS and Heroku.

Django 3...2...1...Takeoff! by Bryam Loaiza_468 x 60 copy.png

Django.tar.gz

AWS_REGION

ch1-to-5-and-ch13-lsn1

ch2-lsn2

ch4-lsn3-and-ch6-to-12

ch13-lsn2-to-aws

ch1-lsn3

ch1-lsn1-ch3-lsn1

heroku-job

intro-job

The focus of this course is to learn Django web development by example. You will be developing a web application step-by-step by setting up URLs, views, and templates of different web pages. The course walks you through various useful concepts to give your app a real look. For example, creating and managing user accounts, implementing search filters, uploading images, Bootstrap styling, and cloud deployment using AWS (Amazon Web Services) and Heroku. 

Every concept is presented with an executable environment so that you get hands-on experience. By the end of the course, you will have a real web application using Django. This is a great course for beginners who want to learn the basics of Django and start building along the way.

Django Takeoff: Developing Modern Applications

The listings on the website are not tied to any users yet. Users don’t want to see other peoples’ listings, so we'll use a foreign key to keep track of which users created which listings.

A foreign key is a way to create a relationship in a model. In our case, the relationship is between the listings and the users. Each listing will belong to a specific user who created the listing.

# Update the model


The updated model (***listings/models<span>.py***) is shown in the following widget:

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys


def main():
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'example.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()


import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


React

Dart

GoJS React

Typescript React

Vue.js

In **line 23**, the `Listings` model is linked to the `User` model by means of a foreign key. `null=True` makes it so the field accepts `NULL` values. `on_delete=models.CASCADE` can be explained in the following manner: when we delete a user, all listings related to that user will be deleted as well, just like a cascade effect.

# Update the view

We made one more change so that listings are assigned to each particular user. Open ***listings/views<span>.py*** to see these changes.

The form is nearly identical to what we had before. The only difference is that we store the populated form into the instance variable (**line 23**). Changes in the database are not yet committed because `commit=false` makes it so the form is not saved to the database immediately.

In **line 24**, `request.user` will give us the currently logged-in user. This user will be tied to the listing being created as well. After we get the user who is creating the listing, we proceed to save the form by using `instance.save()` in **line 25**. In this case, changes will be committed to the database.

Learn and practiceforeign key setup to create a relationship on a model.

Introduction

Django Web App Setup

Django Basics

Homepage

Listings Page

New Listing Page

Navbar

Detail Listing Page

My Listings Page

Edit Listing Page

Delete Listing Page

Users App

Register Page

Foreign Key

Images

Django Filters

Styling the Django Web App

Using Amazon Web Services (AWS)

Heroku Deployment

Conclusion

Django Takeoff - Assessment

Appendix

Set Up the Foreign Key

Update the model